Paste any Bitcoin address below. We'll check whether its public key has ever been exposed on-chain — the exact thing a future quantum computer would need to eventually steal it, recorded today and waiting.
An attacker doesn't need a working quantum computer today. They only need to record your exposed public key now, then decrypt it once a quantum computer capable of running Shor's algorithm exists. Every exposed key sitting on-chain today is a future target already logged.
Every native VoidCoin address uses ML-DSA-87 (NIST FIPS 204) — a post-quantum signature scheme from day one. There's no "safe until you spend" window, no legacy key type to accidentally reuse. The address type this checker warns about simply doesn't exist on VoidCoin.